The search providers I pay likely don't pay their sources. Some others (that I don't use) don't even have the original text only providing summaries. Some offer both.
In the end it could lead to mirrors for bots to feed from. So one paid site entry leads to many copies shared between friends, and anyone really.
It it possible to paywall everything with the price falling (or rising) the older it is or the more (or less) a single visitor takes?